Model: EWR03EH – Walk-In Oven

Operating Temperature 

200°F (93°C) to 350°F (177°C)

Heating Medium

Electric, low watt density Incoloy® heaters provide years of trouble free service.  Standard heater bank assemblies are installed in high velocity ductwork to maximize heat transfer.

Airflow Pattern

Horizontal Airflow: Hot air is supplied from one side of the wall and pulled across horizontally to the opposite side wall.

Input Voltage

Standard: 480/3/60. Please consult factory for additional options.

Control System

LEWCO’s standard control package includes a single set-point process temperature controller and redundant high-limit controller. Circulation fan(s) and exhaust fan(s) include air proving circuits that are electrically interlocked with the heating circuit. All controls are housed in a NEMA 12 enclosure employing a full voltage lockable disconnect switch. Controls are wired to NFPA 70 and 79 electrical standards. Other third party certifications available.

Optional:

Door Switch
Disables heat when door is opened on electrically heated ovens; holds burner at low fire on fuel-fired ovens.

Batch Timer
Infinitely adjustable up to 100 hrs., includes illuminated On/ Off switch to indicate timed operation and audible alarm when time has elapsed.

Ramp/ Soak Controller
Programmable ramp/ soak temperature controller with capability to store different recipes with multiple segments.

Chart Recorder
Single pen circular paper chart recorder for continuous monitoring of temperature data. Comes with (1) Type “J” thermocouple input.

PLC
Programmable Logic Controller for processes with numerous inputs and outputs; or requiring automation of material handling equipment. The PLC can also allow for Ethernet connectivity for remote system monitoring.

Touchscreen HMI
Human Machine Interface provides the operator easy access and control of different parts of the equipment. Allows real time monitoring and provides feedback of the process in a visual, easy to read format.

Composite Curing Controls:

Data Logger: Multiple input digital data logger continuously records temperature and other process data. Allows downloading of digital data files through USB or Ethernet connection. Data can also be viewed on a full color display or on a web server when connected to a network.

Thermocouple Jacks: Thermocouple jack panel for high-temperature Type “J” thermocouples, located inside the oven. Includes wiring to data logger if purchased.

Vacuum Ports: ½” NPT thru-wall vacuum ports, each with vacuum rated manual ball valve and indicating gauge. All ports are connected to a 1” NPT header.

Vacuum Pump: Includes motor starter circuit and connection to vacuum header pipe.

Model (NFPA Class B) Overall Dimensions Door Swing Radius Workspace Dimensions Heater Bank
(kW)
Circulating Fan
(CFM)
Motor
(HP)
Air Changes per Minute Exhaust Fan Capacity (CFM) Exhaust Motor (HP) Solvents per Batch
(Gals.)
Ships Fully Assembled
“W “D “H “W “D “H
EWR03EH-48-48-60
118 106 84 24″ 48 48 60 36 1,700 1 21.25 N/A N/A 0 Yes
EWR03EH-48-48-72
122 106 96 24″ 48 48 72 36 2,000 1 1/2 20.83 N/A N/A 0 Yes
EWR03EH-48-48-96
128 106 120 24″ 48 48 96 45 2,500 2 19.53 N/A N/A 0 No
EWR03EH-48-72-72
130 134 96 24″ 48 72 72 45 3,000 2 20.83 N/A N/A 0 Yes
EWR03EH-48-72-96
136 140 120 24″ 48 72 96 45 4,000 3 20.83 N/A N/A 0 No
EWR03EH-48-96-72 136 164 96 24″ 48 96 72 45 4,000 3 20.83 N/A N/A 0 Yes
EWR03EH-48-96-96 148 168 120 24″ 48 96 96 54 5,000 3 19.53 N/A N/A 0 No
EWR03EH-60-60-60
140 118 84 30″ 60 60 60 45 2,500 2 20.00 N/A N/A 0 Yes
EWR03EH-60-60-72 142 122 96 30″ 60 60 72 45 3,000 2 20.00 N/A N/A 0 Yes
EWR03EH-60-60-96 148 128 120 30″ 60 60 96 45 4,000 3 20.00 N/A N/A 0 No
EWR03EH-60-72-72 148 134 96 30″ 60 72 72 45 3,500 3 19.44 N/A N/A 0 Yes
EWR03EH-60-72-96 154 144 120 30″ 60 72 96 54 4,500 3 18.75 N/A N/A 0 No
EWR03EH-60-96-96 164 174 120 30″ 60 96 96 54 6,000 3 18.75 N/A N/A 0 No
EWR03EH-72-72-72
160 140 96 36″ 72 72 72 45 4,000 3 18.52 N/A N/A 0 Yes
EWR03EH-72-72-96 172 150 120 36″ 72 72 96 54 5,500 3 19.10 N/A N/A 0 No
EWR03EH-72-96-96 194 174 120 36″ 72 96 96 63 8,000 5 20.83 N/A N/A 0 No
EWR03EH-72-120-96
206 198 120 36″ 72 120 96 72 9,000 7 1/2 18.75 N/A N/A 0 No
Model (NFPA Class A) Overall Dimensions Door Swing Radius Workspace Dimensions Heater Bank
(kW)
Circulating Fan
(CFM)
Motor
(HP)
Air Changes per Minute Exhaust Fan Capacity (CFM) Exhaust Motor (HP) Solvents per Batch
(Gals.)
Ships Fully Assembled
“W “D “H “W “D “H
EWR03EH-48-48-60
118 106 123 24″ 48 48 60 36 1,700 1 21.25 62 1/4 0.06 Yes
EWR03EH-48-48-72
122 106 135 24″ 48 48 72 45 2,000 1 1/2 20.83 62 1/4 0.06 Yes
EWR03EH-48-48-96
128 106 159 24″ 48 48 96 45 2,500 2 19.53 62 1/4 0.06 No
EWR03EH-48-72-72
130 134 135 24″ 48 72 72 45 3,000 2 20.83 62 1/4 0.06 Yes
EWR03EH-48-72-96
136 140 159 24″ 48 72 96 54 4,000 3 20.83 62 1/4 0.06 No
EWR03EH-48-96-72 136 164 135 24″ 48 96 72 54 4,000 3 20.83 62 1/4 0.06 Yes
EWR03EH-48-96-96 148 168 159 24″ 48 96 96 54 5,000 3 19.53 62 1/4 0.06 No
EWR03EH-60-60-60
140 118 123 30″ 60 60 60 45 2,500 2 20.00 62 1/4 0.06 Yes
EWR03EH-60-60-72 142 122 135 30″ 60 60 72 45 3,000 2 20.00 62 1/4 0.06 Yes
EWR03EH-60-60-96 148 128 159 30″ 60 60 96 54 4,000 3 20.00 62 1/4 0.06 No
EWR03EH-60-72-72 148 134 135 30″ 60 72 72 54 3,500 3 19.44 62 1/4 0.06 Yes
EWR03EH-60-72-96 154 144 159 30″ 60 72 96 54 4,500 3 18.75 62 1/4 0.06 No
EWR03EH-60-96-96 164 174 159 30″ 60 96 96 63 6,000 3 18.75 100 1/4 0.10 No
EWR03EH-72-72-72
160 140 135 36″ 72 72 72 54 4,000 3 18.52 62 1/4 0.06 Yes
EWR03EH-72-72-96 172 150 159 36″ 72 72 96 63 5,500 3 19.10 62 1/4 0.06 No
EWR03EH-72-96-96 194 174 159 36″ 72 96 96 72 8,000 5 20.83 100 1/4 0.10 No
EWR03EH-72-120-96
206 198 159 36″ 72 120 96 72 9,000 7 1/2 18.75 100 1/4 0.10 No

Note: Sizes are approximate. LEWCO, Inc. reserves the right to change specifications without notice.

Standard oven construction includes a 16 gauge aluminized steel interior with a 18 gauge cold rolled steel exterior. Heat loss is minimized by a unique wall design featuring a welded inner shell and a completely isolated outer frame and covers.

Doors

Heavy-duty doors on an isolated door frame minimize heat loss. Wire core gaskets create a tight seal for efficient heating. Standard doors are bi-parting swing at one end and include explosion venting latches.

     Standard Options:

  • Vertical lift guillotine door
  • Door windows

Flooring

Standard ovens include a 12 gauge steel plate floor.

     Standard Options:

  • 12 gauge plate floor with (1) pair inverted angle track
  • 12 gauge plate floor with (1) pair 6” wide wheel guides
  • Insulated (100 p.s.f. max)
  • Insulated with (1) pair inverted angle track
  • Insulated with (1) pair 6” wide wheel guides
  • No floor

LEWCO industrial ovens are designed and manufactured to industry standards. Our engineers regularly work to keep updated with the latest revisions in industry codes. If there is a specific industry standard or code compliance that you require for your process heating application, please contact one of our highly knowledgeable applications engineers to learn how LEWCO can help!

 

About NFPA 86

The National Fire Protection Association’s standard, NFPA 86, documents the guidelines for the safe operation of industrial ovens and furnaces. All LEWCO ovens are designed and manufactured to meet the requirements of this standard. Oven and furnaces in which flammable volatiles or combustible materials are present in the work space are classified by NFPA 86 as “Class A.” Similarly, ovens and furnaces in which no flammable volatiles or combustible materials are present are classified as “Class B.” Due to the risk of fire or explosion, NFPA 86 requires specific safety equipment for all Class A ovens and furnaces. Fuel gas-fired ovens and furnaces also require safety equipment.

  • Powered exhaust of capacity determined by maxium solvent loading.
  • Explosion relief of adequate area determined by oven or furnace workspace volume.

 

Industry Standards